#include"mymath.h"
#include"mystdio.h"
int main()
{
    int ret=myAdd(10,20);
    printf("%d+%d=%d\n",10,20,ret);
    myFILE*fp = myfopen("log.txt","w");
    if(fp==NULL)
    {
        return 1;
    }
    myfclose(fp);
    return 0;
}
